add gm: colorwheel
BUG=skia:3061
Review URL: https://codereview.chromium.org/680533002
diff --git a/gm/colorwheel.cpp b/gm/colorwheel.cpp
new file mode 100644
index 0000000..93c5938
--- /dev/null
+++ b/gm/colorwheel.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Resources.h"
+#include "SkData.h"
+#include "SkDecodingImageGenerator.h"
+#include "gm.h"
+
+static void checkerboard(
+ SkCanvas* canvas, int w, int h, int size, SkColor c1, SkColor c2) {
+ SkAutoCanvasRestore autoCanvasRestore(canvas, true);
+ canvas->clipRect(SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h)));
+ canvas->drawColor(c1);
+ SkPaint paint;
+ paint.setColor(c2);
+ SkScalar s = SkIntToScalar(size);
+ for (int y = 0; y < h; y += size) {
+ SkScalar ty = SkIntToScalar(y);
+ bool oddRow = (y % (2 * size)) != 0;
+ for (int x = oddRow ? size : 0; x < w; x += (2 * size)) {
+ SkScalar tx = SkIntToScalar(x);
+ canvas->drawRect(SkRect::MakeXYWH(tx, ty, s, s), paint);
+ }
+ }
+}
+
+static void draw_bitmap(SkCanvas* canvas, const char* resource, int x, int y) {
+ SkBitmap bitmap;
+ if (GetResourceAsBitmap(resource, &bitmap)) {
+ canvas->drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y));
+ } else {
+ SkDebugf("\nCould not decode file '%s'. Did you forget"
+ " to set the resourcePath?\n", resource);
+ }
+}
+
+/*
+ This GM tests whether the image decoders properly decode each color
+ channel. Four copies of the same image should appear in the GM, and
+ the letter R should be red, B should be blue, G green, C cyan, M
+ magenta, Y yellow, and K black. In all but the JPEG version of the
+ image, the letters should be on a white disc on a transparent
+ background (rendered as a checkerboard). The JPEG image has a grey
+ background and compression artifacts.
+ */
+DEF_SIMPLE_GM(colorwheel, canvas, 256, 256) {
+ canvas->clear(SK_ColorWHITE);
+ checkerboard(canvas, 256, 556, 8, 0xFF999999, 0xFF666666);
+ draw_bitmap(canvas, "color_wheel.png", 0, 0); // top left
+ draw_bitmap(canvas, "color_wheel.gif", 128, 0); // top right
+ draw_bitmap(canvas, "color_wheel.webp", 0, 128); // bottom left
+ draw_bitmap(canvas, "color_wheel.jpg", 128, 128); // bottom right
+}
diff --git a/gm/gm.h b/gm/gm.h
index e48f772..9ba9f45 100644
--- a/gm/gm.h
+++ b/gm/gm.h
@@ -24,6 +24,20 @@
static skiagm::GM* SK_MACRO_APPEND_LINE(F_)(void*) { code; } \
static skiagm::GMRegistry SK_MACRO_APPEND_LINE(R_)(SK_MACRO_APPEND_LINE(F_));
+// See colorwheel.cpp for example usage.
+#define DEF_SIMPLE_GM(NAME, CANVAS, W, H) \
+ class SK_MACRO_CONCAT(NAME, _GM) : public skiagm::GM { \
+ virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE; \
+ virtual SkISize onISize() SK_OVERRIDE { \
+ return SkISize::Make((W), (H)); \
+ } \
+ virtual SkString onShortName() SK_OVERRIDE { \
+ return SkString(#NAME); \
+ } \
+ }; \
+ DEF_GM( return SkNEW(SK_MACRO_CONCAT(NAME, _GM)); ) \
+ void SK_MACRO_CONCAT(NAME, _GM)::onDraw(SkCanvas* CANVAS)
+
namespace skiagm {
class GM {